Severn Trent Water
Gas to Grid Plant
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nmcn were appointed by Clients Severn Trent Green Power to construct a biomethane gas to grid plant. The project based at Stoke Bardolph in Nottinghamshire turns gas produced from energy crops into a renewable gas that is a fully sustainable resource and can be injected directly into the grid
The physical constraints of the site and the need to be able to keep the existing reservoir operational, meant that the design and construction team had to expose the west face of the existing buried reservoir to enable the new distribution chambers and pipework to be safely constructed between the new and old reservoirs.
Crop materials are fed into large anaerobic digesters, bacteria are added and the mixture is kept at a specifc temperature range, as the crops break down methane is produced, this gas is then exported to the gas to grid unit. The gas is then cleaned of any impuritites.
The gas is ‘washed’ at high pressure and then ‘squashed’ so it is at the same pressure as natural gas before being tested for quality. An odour is then added so it smells like normal gas and once that has been done, it is finally injected into the gas supply network.
The scheme was very successful and was one of three similar projects all of which were delivered by nmcn.
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